Effect of ultrasonic treatment on the impregnation of RTM composites

The weak impregnation will result in the formation of traps in the composites because the impregnation of the resin to fiber reinforcement is one of the major factors during the filling process of RTM. It will degrade mechanical performance of the composites. Ultrasonic technology is adapted during the RTM process, and the effect of ultrasonic treatment on the viscosity and surface tension of resin, RTM impregnation and bend property of composite is studied. The results show that ultrasonic treatment degrades the viscosity and surface tension of resin and improves RTM impregnation, which enhances the bend property of RTM composites.